A photographer has launched an international, online search to track down a newly-married couple he photographed in London.

Canada-based Saber Miresmailli was in a taxi when he spotted the bride and groom in a romantic embrace by the River Thames, with Tower Bridge in the background, on May 16.

It was until he looked back at his photos later when he realised what a stunning photo he had captured of the couple dressed in their wedding finery.

He has now launched an appeal online to track down the couple and give them the photo as a gift and memento of their special day.

Saber launched his appeal on Facebook and has already seen his post shared more than 200,000 times across the globe.

Writing on the social network site, he said: "A request to the Facebook Nation: I was on a moving car in London, UK on May 16, 2015 around 8pm, when I saw this lovely couple. They were alone and I didn't see any photographer with them. I managed to shoot this picture with them and the London Bridge in the background. I have the high quality picture and I (sic) love to find them and give it to them as a gift. Do you think you can share this and help me find them? Thanks!"